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<h2><span class="refentrytitle">Macro BOOST_CONTRACT_ASSERT_AXIOM</span></h2>
<p>BOOST_CONTRACT_ASSERT_AXIOM — Preferred way to document in the code contract conditions that are computationally prohibitive, at least compared to the computational cost of executing the function body. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="reference.html#header.boost.contract.assert_hpp" title="Header &lt;boost/contract/assert.hpp&gt;">boost/contract/assert.hpp</a>&gt;

</span>BOOST_CONTRACT_ASSERT_AXIOM(cond)</pre></div>
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<a name="idm45885988311632"></a><h2>Description</h2>
<p>The asserted condition will always be compiled and validated syntactically, but it will never be checked at run-time. This macro is defined by code equivalent to:</p>
<pre class="programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_CONTRACT_ASSERT_AXIOM</span><span class="special">(</span><span class="identifier">cond</span><span class="special">)</span> \
    <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="keyword">true</span> <span class="special">||</span> <span class="identifier">cond</span><span class="special">)</span>
</pre>
<p> <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_ASSERT.html" title="Macro BOOST_CONTRACT_ASSERT">BOOST_CONTRACT_ASSERT</a></code>, <code class="computeroutput"><a class="link" href="BOOST_CO_idm45125849739040.html" title="Macro BOOST_CONTRACT_ASSERT_AUDIT">BOOST_CONTRACT_ASSERT_AUDIT</a></code>, and  <code class="computeroutput"><a class="link" href="BOOST_CO_idm45125876363056.html" title="Macro BOOST_CONTRACT_ASSERT_AXIOM">BOOST_CONTRACT_ASSERT_AXIOM</a></code> are the three assertion levels predefined by this library. If there is a need, programmers are free to implement their own assertion levels defining macros similar to the one above.</p>
<p><span class="bold"><strong>See Also:</strong></span></p>
<p> <a class="link" href="boost_contract/extras.html#boost_contract.extras.assertion_levels" title="Assertion Levels"> Assertion Levels</a>,  <a class="link" href="boost_contract/extras.html#boost_contract.extras.no_macros__and_no_variadic_macros_" title="No Macros (and No Variadic Macros)"> No Macros</a></p>
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<td><p><span class="term"><code class="computeroutput">cond</code></span></p></td>
<td><p>Boolean contract condition to check. (This is not a variadic macro parameter so any comma it might contain must be protected by round parenthesis and <code class="computeroutput">BOOST_CONTRACT_ASSERT_AXIOM((cond))</code> will always work.) </p></td>
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<td align="right"><div class="copyright-footer">Copyright © 2008-2019 Lorenzo Caminiti<p>
        Distributed under the Boost Software License, Version 1.0 (see accompanying
        file LICENSE_1_0.txt or a copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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